Battery module and electric device

Abstract

The utility model relates to the technical field of power batteries, and discloses a battery module and an electric device. The battery module comprises a temperature sensing support, a square battery cell, a liquid cooling plate and a busbar, the temperature sensing support is located between the top of the square battery cell and the liquid cooling plate, an output electrode of the square battery cell is connected with the busbar, the busbar is connected with the liquid cooling plate through heat-conducting glue, the temperature sensing support comprises a support body and a supporting part, and the support body is used for installing a temperature sensor. The support body is connected with a busbar, the support body is provided with a first side and a second side which are opposite in the Z direction, the second side directly faces the square battery cell, the supporting part is arranged on the support body, and the side, away from the square battery cell, of the supporting part is arranged on the first side in a protruding mode and abuts against the liquid cooling plate. The temperature sensing support of the utility model has the functions of installing the temperature sensor and supporting the liquid cooling plate at the same time. When the temperature sensing support is used for supporting the liquid cooling plate, the arrangement of a hard foam layer in a traditional top liquid cooling device can be omitted, and the foam installation procedure and the foam cost are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a battery module and an electrical device equipped with the battery module. Background Art

[0002] The temperature sensor is mounted on a temperature-sensing bracket and attached to the battery cell to sense the cell's temperature. The busbar is connected to the cell's output terminal and to the top liquid cooling plate via thermal adhesive. To ensure the thermal adhesive has a certain thickness, traditional top liquid cooling devices typically place a layer of rigid foam on the side of the top liquid cooling plate facing the battery cell. This rigid foam layer supports the liquid cooling plate and prevents deformation of the liquid cooling plate during the curing process, which could affect the thickness of the thermal adhesive and thus the heat dissipation of the battery cell and busbar.

[0003] In the prior art, the temperature sensing bracket is only used to install the temperature sensor, and its function is single. The operation of attaching foam to one side of the liquid cooling plate is complicated and the cost of the foam is high. Utility Model Content

[0004] The purpose of the embodiments of the present invention is to provide a battery module and an electrical device, which can use a temperature sensing bracket to install a temperature sensor and support a liquid cooling plate, saving the foam installation process and foam costs.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] On the one hand, a battery module is provided, comprising a square battery cell, a bus bar, a liquid cooling plate and a temperature sensing bracket, wherein the temperature sensing bracket is located between the top of the square battery cell and the liquid cooling plate, the width of the square battery cell extends along the X direction, the thickness of the square battery cell extends along the Y direction, and the height of the square battery cell extends along the Z direction, the X direction, the Y direction and the Z direction intersect with each other, an output pole is provided on the top of the square battery cell, the output pole is connected to the bus bar, and the side of the bus bar facing away from the square battery cell is connected to the liquid cooling plate through thermal conductive glue, the temperature sensing bracket comprises a bracket body and a support portion, the bracket body is used to mount a temperature sensor, the thickness of the bracket body extends along the Z direction, the bracket body is connected to the bus bar, the bracket body has a first side and a second side opposite to each other along the Z direction, the second side faces the square battery cell, the support portion is provided on the bracket body, and the side of the support portion facing away from the square battery cell is protruded from the first side and abuts against the liquid cooling plate.

[0007] As a further solution of the battery module, the support portion passes through the bracket body, and the support portion is protruded from the second side toward a side of the square battery cell and abuts against a top cover of the square battery cell.

[0008] As a further solution of the battery module, the support portion has a first groove, the notch of the first groove faces one side of the square battery cell, and a reinforcement portion is provided in the first groove.

[0009] As a further solution of the battery module, the temperature sensing bracket also includes a second groove and a thermal pad. The second groove is used to install the temperature sensor. The bracket body is recessed toward the first side to form the second groove. The notch of the second groove faces the top cover of the square battery cell. The thermal pad is attached to the second side of the bracket body and covers at least part of the notch of the second groove. The side of the thermal pad facing the square battery cell protrudes from the second side and abuts against the top cover of the square battery cell.

[0010] As a further solution of the battery module, the distance between the side of the thermal pad facing the square battery cell and the second side is not less than the distance between the side of the support portion facing the square battery cell and the second side.

[0011] As a further solution of the battery module, a mounting step is provided on the second side of the bracket body corresponding to the thermal pad, the mounting step extends to the second groove, and the thermal pad is attached to the mounting step.

[0012] As a further solution of the battery module, the height of the second groove on a side away from the square battery cell is lower than the height of the support portion on a side away from the square battery cell.

[0013] As a further solution of the battery module, an explosion-proof valve is provided on the top of the square battery cell, and an avoidance hole is passed through the bracket body along the Z direction. The avoidance hole is opposite to the explosion-proof valve and is located between the support part and the second groove.

[0014] As a further solution of the battery module, both ends of the bracket body along the X direction are respectively connected to one of the bus bars.

[0015] On the other hand, an electrical device is provided, comprising a mounting base and the battery module, wherein the battery module is mounted on the mounting base.

[0016] Beneficial effects:

[0017] In the present utility model, the temperature sensor is installed on the bracket body of the temperature sensor bracket. By providing a support portion on the bracket body and making the support portion abut against the liquid cooling plate, a good support effect can be achieved on the liquid cooling plate, preventing the liquid cooling plate from deforming and affecting the thickness of the thermal conductive adhesive injected between the busbar and the liquid cooling plate, avoiding the thinning of the thickness of the thermal conductive adhesive in some areas due to the deformation of the liquid cooling plate, and preventing the heat dissipation effect of the square battery cell and the busbar from being affected. Compared with the prior art, the temperature sensor bracket of the present utility model has the functions of installing the temperature sensor and supporting the liquid cooling plate at the same time. Using the temperature sensor bracket of this embodiment to support the liquid cooling plate can omit the setting of the rigid foam layer in the traditional top liquid cooling device, saving the foam installation process and foam cost.

[0018] In the present utility model, the temperature sensor is installed in a second groove recessed from the bracket body towards the first side. The second groove can protect the temperature sensor, and at the same time, the heat-conducting pad can play a certain role in bonding and fixing the temperature sensor when it is attached to the second side of the bracket body, improving the installation stability of the temperature sensor. Compared with the traditional method of pasting the temperature sensor with glue, the installation efficiency of the temperature sensor is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present utility model will be further described in detail below with reference to the drawings and embodiments.

[0020] Figure 1 It is a partial structural schematic diagram of the battery module according to the embodiment of the present utility model.

[0021] Figure 2 It is an exploded schematic diagram of the partial structure of the battery module according to the embodiment of the present utility model.

[0022] Figure 3 It is a structural schematic diagram of the temperature sensor bracket according to the embodiment of the present utility model from the first perspective.

[0023] Figure 4 It is a structural schematic diagram of the temperature sensor bracket according to the embodiment of the present utility model from the second perspective.

[0024] Figure 5 It is a side view schematic diagram of the temperature sensor bracket according to the embodiment of the present utility model along the Y direction.

[0025] In the figure:

[0026] 100, temperature sensor bracket; 110, bracket body; 111, first side; 112, second side; 113, second groove; 114, mounting step; 115, avoidance hole; 120, support portion; 121, first groove; 122, strengthening portion; 130, heat-conducting pad; 140, clamping portion; 141, clamping post; 142, convex block;

[0027] 200, Square battery cell; 210, Top; 220, Output electrode; 230, Explosion-proof valve;

[0028] 300, Liquid cooling plate;

[0029] 400, Busbar; 410, Connection hole. Detailed implementation manner

[0030] To make the technical problems solved by the present utility model, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the embodiments of the present utility model will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0031] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below", and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0033] In the description of this embodiment, if terms such as "above", "below", "left", "right" and other orientation or position relationships appear, they are all based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, if terms such as "first", "second" and the like appear, they are only used for distinction in description and have no special meaning.

[0034] Such as Figures 1 to 5As shown in the figure, this embodiment provides a battery module, including a temperature sensor bracket 100, a square battery cell 200, a liquid cooling plate 300, and a bus bar 400. The temperature sensor bracket 100 is located between the top 210 of the square battery cell 200 and the liquid cooling plate 300. The width of the square battery cell 200 extends along the X direction, the thickness of the square battery cell 200 extends along the Y direction, and the height of the square battery cell 200 extends along the Z direction. The X direction, Y direction, and Z direction intersect with each other. An output electrode 220 is provided on the top 210 of the square battery cell 200. The output electrodes 220 are arranged at intervals along the X direction. The output electrodes 220 are connected to the bus bar 400. One side of the bus bar 400 facing away from the square battery cell 200 is connected to the liquid cooling plate 300 through a thermal conductive adhesive. The temperature sensor bracket 100 includes a bracket body 110 and a support portion 120. The bracket body 110 is used to install a temperature sensor. The thickness of the bracket body 110 extends along the Z direction. Both ends of the bracket body 110 along the X direction are respectively connected to a bus bar 400. The bracket body 110 has opposite first side 111 and second side 112 along the Z direction. The second side 112 faces the square battery cell 200. The support portion 120 is provided on the bracket body 110. One side of the support portion 120 facing away from the square battery cell 200 protrudes from the first side 111 and abuts against the liquid cooling plate 300.

[0035] In this embodiment, the temperature sensor is installed on the bracket body 110 of the temperature sensor bracket 100. By providing the support portion 120 on the bracket body 110 and making the support portion 120 abut against the liquid cooling plate 300, a good supporting effect can be achieved on the liquid cooling plate 300, preventing the liquid cooling plate 300 from deforming and affecting the thickness of the thermal conductive adhesive injected between the bus bar 400 and the liquid cooling plate 300, avoiding the thickness of the thermal conductive adhesive becoming thinner in some areas due to the deformation of the liquid cooling plate 300, and preventing the heat dissipation effect of the square battery cell 200 and the bus bar 400 from being affected.

[0036] Compared with the prior art, the temperature sensor bracket 100 of this embodiment has the functions of installing a temperature sensor and supporting the liquid cooling plate 300 at the same time. Using the temperature sensor bracket 100 of this embodiment to support the liquid cooling plate 300 can omit the setting of the rigid foam layer in the traditional top liquid cooling device, saving the foam installation process and foam cost.

[0037] Exemplarily, two output electrodes 220 are provided on the top 210 of the square battery cell 200. The two output electrodes 220 are arranged at intervals along the X direction. The two output electrodes 220 are respectively connected to a bus bar 400.

[0038] Further, the support portion 120 penetrates through the bracket body 110, and one side of the support portion 120 facing the square battery cell 200 protrudes from the second side 112 and abuts against the top cover 210 of the square battery cell 200. With this structural design, the two sides of the support portion 120 along the Z direction can respectively abut against the liquid cooling plate 300 and the top cover 210 of the square battery cell 200. By using the top cover 210 of the square battery cell 200 as the load-bearing surface of the support portion 120, the supporting effect of the support portion 120 on the liquid cooling plate 300 can be effectively improved.

[0039] Exemplarily, the support portion 120 is of a cuboid structure, and its interior is designed with a hollow structure. As Figure 4 shown, the support portion 120 has a first groove 121, the notch of the first groove 121 faces the side of the square battery cell 200, and a reinforcing portion 122 is provided in the first groove 121. Through the hollow structure design, the weight of the temperature-sensitive bracket 100 can be reduced. At the same time, by providing the reinforcing portion 122 in the first groove 121, the sufficient structural strength of the support portion 120 can be ensured while reducing the weight of the temperature-sensitive bracket 100.

[0040] Among them, the reinforcing portion 122 includes a plurality of reinforcing plates, the plurality of reinforcing plates are arranged at intervals along the Y direction, and the reinforcing plates are connected to the bottom of the first groove 121 and the two opposite groove walls of the first groove 121 along the X direction. Optionally, the number of the reinforcing plates is determined according to the height of the support portion 120 along the Y direction, so as to ensure that the liquid cooling plate 300 does not deform when the support portion 120 supports the liquid cooling plate 300.

[0041] Further, the temperature-sensitive bracket 100 further includes a heat-conducting pad 130. The bracket body 110 is recessed toward the first side 111 to form a second groove 113. The notch of the second groove 113 faces the top cover 210 of the square battery cell 200. The heat-conducting pad 130 is attached to the second side 112 of the bracket body 110 and covers the notch of the second groove 113. One side of the heat-conducting pad 130 facing the square battery cell 200 protrudes from the second side 112 and abuts against the top cover 210 of the square battery cell 200.

[0042] Exemplarily, the heat-conducting pad 130 does not completely cover the notch of the second groove 113, but only covers a part of the notch, so as to stably install the temperature sensor in the second groove 113. Of course, in other embodiments, the heat-conducting pad 130 can also completely cover the notch of the second groove 113.

[0043] The temperature sensor is installed in the second groove 113 recessed towards the first side 111 by the bracket body 110. The second groove 113 can protect the temperature sensor. While the heat-conducting pad 130 is attached to the second side 112 of the bracket body 110, it can play a certain pasting role for the temperature sensor, improving the installation stability of the temperature sensor. In this embodiment, the heat-conducting pad 130 is attached to the bracket body 110 and covers the notch of the second groove 113, which effectively improves the installation efficiency of the temperature sensor compared with the existing method of pasting the temperature sensor with glue.

[0044] As Figure 4 shown, both sides of the second groove 113 along the Y direction are open structures. This open structure can enable the second groove 113 to adapt to temperature sensors of various sizes and models, such as various water-droplet head temperature sensors.

[0045] Furthermore, after the heat-conducting pad 130 is attached to the second side 112 and covers the notch of the second groove 113, the distance between the side of the heat-conducting pad 130 facing the square battery cell 200 and the second side 112 is not less than the distance between the side of the supporting portion 120 facing the square battery cell 200 and the second side 112. Thus, the heat-conducting pad 130 can be in contact with the top cover 210 of the square battery cell 200, ensuring that there is always a tight fit between the heat-conducting pad 130 and the top cover 210 of the square battery cell 200, and improving the accuracy of the detection data of the temperature sensor.

[0046] Optionally, the distance between the side of the heat-conducting pad 130 facing the square battery cell 200 and the second side 112 is equal to the distance between the side of the supporting portion 120 facing the square battery cell 200 and the second side 112, that is, the side of the heat-conducting pad 130 facing the square battery cell 200 and the side of the supporting portion 120 facing the square battery cell 200 are in the same plane, and the supporting portion 120 and the heat-conducting pad 130 are respectively in contact with the top cover 210 of the square battery cell 200. In other specific embodiments, the distance between the side of the heat-conducting pad 130 facing the square battery cell 200 and the second side 112 is slightly greater than the distance between the side of the supporting portion 120 facing the square battery cell 200 and the second side 112. Since the supporting portion 120 and the heat-conducting pad 130 are arranged at intervals, the supporting portion 120 can be pressed down by the pressure of the liquid cooling plate 300 to be in contact with the top cover 210 of the square battery cell 200, and at the same time, the bracket body 110 undergoes a slight deformation. This deformation can enable the heat-conducting pad 130 to always be in contact with the top cover 210 of the square battery cell 200.

[0047] To improve the installation stability and convenience of the heat-conducting pad 130, in this embodiment, an installation step 114 is recessed on the second side 112 of the bracket body 110 corresponding to the heat-conducting pad 130. The installation step 114 extends to the second groove 113, and the heat-conducting pad 130 is attached to the installation step 114.

[0048] Exemplarily, mounting steps 114 are respectively provided at the edges of the bracket body 110 adjacent to the second groove 113. The mounting steps 114, and the heat-conducting pad 130 has a rectangular structure and is pasted on the step surface of the mounting step 114.

[0049] Further, the height of the side of the second groove 113 facing away from the square battery cell 200 is lower than the height of the side of the supporting portion 120 facing away from the square battery cell 200, so as to prevent the liquid cooling plate 300 from pressing on the side of the second groove 113 facing away from the square battery cell 200, and avoid the second groove 113 being squeezed and deformed to damage the temperature sensor installed in the second groove 113.

[0050] In this embodiment, as Figure 2 shown, an explosion-proof valve 230 is provided at the top 210 of the square battery cell 200. The bracket body 110 has an avoidance hole 115 penetrating along the Z direction. The avoidance hole 115 is directly opposite to the explosion-proof valve 230, and the avoidance hole 115 is located between the supporting portion 120 and the second groove 113. Among them, the explosion-proof valve 230 is located between the two output poles 220.

[0051] Exemplarily, the shape of the avoidance hole 115 is an oval structure, similar to the structure of the explosion-proof valve 230, and the size of the avoidance hole 115 is slightly larger than the size of the explosion-proof valve 230. When the square battery cell 200 fails, the explosion-proof valve 230 opens, and the design of the avoidance hole 115 can reserve space for the opening of the explosion-proof valve 230.

[0052] Further, both ends of the bracket body 110 in the X direction are respectively clamped with one of the busbars 400 to improve the installation convenience of the temperature sensor bracket 100.

[0053] Exemplarily, one clamping portion 140 is respectively provided at both ends of the bracket body 110 in the X direction. Correspondingly, as Figure 2 shown, the busbar 400 is provided with a connection hole 410 corresponding to the clamping portion 140, and the clamping portion 140 is clamped and fixed with the connection hole 410. Specifically, the clamping portion 140 protrudes from the first side 111 of the bracket body 110. The bracket body 110 is located between the busbar 400 and the square battery cell 200. As Figure 5 shown, the clamping portion 140 includes two clamping columns 141 arranged at intervals. On the sides of the two clamping columns 141 facing away from each other and adjacent to the ends of the clamping columns 141, there are convex blocks 142. The surface of the convex block 142 facing away from the square battery cell 200 is an inclined surface. With this structural design, the clamping portion 140 can smoothly pass through the connection hole 410 from the side of the busbar 400 close to the square battery cell 200 and be clamped and fixed by the convex blocks 142.

[0054] In this embodiment, the area of the bracket body 110 on the side of the support portion 120 away from the second groove 113 is a triangular-like structure. Similarly, the area of the bracket body 110 on the side of the second groove 113 away from the support portion 120 is a triangular-like structure. Compared with the overall rectangular structure of the bracket body 110, the weight of the temperature-sensitive bracket 100 can be reduced.

[0055] In this embodiment, the temperature-sensitive bracket 100 is made of plastic and is integrally injection-molded by a mold.

[0056] This embodiment also provides an electrical device, including a mounting base and the battery module of the above embodiment. The battery module is mounted on the mounting base. The electrical device is, for example, a new energy vehicle. In the battery module mounted on the new energy vehicle, the temperature-sensitive bracket can support the liquid cooling plate while mounting the temperature sensor, omitting the setting of the rigid foam layer in the traditional top liquid cooling device, saving the foam installation process and foam cost.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery module, characterized in that, The battery module includes a temperature sensor bracket, square battery cells, a liquid cooling plate, and a bus bar. The temperature sensor bracket is located between the top of the square battery cells and the liquid cooling plate. The width of the square battery cells extends in the X direction, the thickness of the square battery cells extends in the Y direction, and the height of the square battery cells extends in the Z direction. The X direction, the Y direction, and the Z direction intersect with each other. An output pole is provided at the top of the square battery cells, and the output pole is connected to the bus bar. One side of the bus bar facing away from the square battery cells is connected to the liquid cooling plate through a heat-conducting adhesive. The temperature sensor bracket includes a bracket body and a supporting portion. The bracket body is used for installing a temperature sensor. The thickness of the bracket body extends in the Z direction. The bracket body is connected to the bus bar. The bracket body has a first side and a second side opposite to each other in the Z direction. The second side faces the square battery cells. The supporting portion is provided on the bracket body. One side of the supporting portion facing away from the square battery cells protrudes from the first side and abuts against the liquid cooling plate.

2. The battery module according to claim 1, wherein The supporting portion penetrates through the bracket body. One side of the supporting portion facing the square battery cells protrudes from the second side and abuts against the top cover of the square battery cells.

3. The battery module according to claim 2, wherein The supporting portion has a first groove. The notch of the first groove faces the side of the square battery cells. A reinforcing portion is provided in the first groove.

4. The battery module according to claim 1, wherein The temperature sensor bracket further includes a second groove and a heat-conducting pad. The second groove is used for installing a temperature sensor. The bracket body is recessed toward the first side to form the second groove. The notch of the second groove faces the top cover of the square battery cells. The heat-conducting pad is attached to the second side of the bracket body and at least covers a part of the notch of the second groove. One side of the heat-conducting pad facing the square battery cells protrudes from the second side and abuts against the top cover of the square battery cells.

5. The battery module according to claim 4, characterized in that, The distance between one side of the heat-conducting pad facing the square battery cells and the second side is not less than the distance between one side of the supporting portion facing the square battery cells and the second side.

6. The battery module according to claim 4, characterized in that, An installation step is recessed on the second side of the bracket body corresponding to the heat-conducting pad. The installation step extends to the second groove. The heat-conducting pad is attached to the installation step.

7. The battery module according to claim 4, wherein, The height of one side of the second groove facing away from the square battery cells is lower than the height of one side of the supporting portion facing away from the square battery cells.

8. The battery module according to claim 5, characterized in that, An explosion-proof valve is provided at the top of the square battery cells. An avoidance hole is penetrated through the bracket body in the Z direction. The avoidance hole is aligned with the explosion-proof valve. The avoidance hole is located between the supporting portion and the second groove.

9. The battery module according to any one of claims 1 to 8, characterized in that, Both ends of the bracket body in the X direction are respectively clamped with one of the bus bars.

10. An electrical device, characterized in that, It includes an installation base and the battery module according to any one of claims 1 to 9. The battery module is installed on the installation base.

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